It was goal of the Los Angeles police department tonight. To facilitate the first amendment rights people who wanted to peacefully protest. -- fortunately we were sorely disappointed. -- access to about a 150 individuals. Who decided to break away from the peaceful protest. And vandalized and assault individuals of Mike -- a boulevard. We deployed over 300 police officers. Dozen arrests and multiple incidents of vandalism. Several incidents of assault and this will not be allowed to continue. Unfortunately. The rights of the many. Have been abused by the actions of a few. Because of that. Tomorrow the Los Angeles police department we'll have a much stricter -- In the way that we deal with people taking this into Crenshaw boulevard. That is extremely unfortunate. We want to facilitate first amendment rights we want to let people to speak. And a lawful and peaceful way. To honor the ideas which -- -- what they question which to protest. But we cannot allow. That activity. To infringe on the property rights and the physical safety of the residents. Of this community.

This transcript has been automatically generated and may not be 100% accurate.

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